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Cisco Quality of Service (QoS) Sample Questions:

1. Which three characteristics are drawbacks to the use of a best-effort with over-provisioning backbone design? (Choose three.)

A) It requires complex QoS mechanisms at the network edge.
B) Unplanned network failures can cause unexpected congestion in the network.
C) It requires complex QoS mechanisms at the network core.
D) The design costs more to implement than a DiffServ backbone.
E) Denial of Service attacks on one service can affect all network traffic.
F) The design uses a different over-provisioning ratio for the different traffic classes.

2. Refer to the exhibit. According to the show output, which statement is true?

A) NBAR protocol discovery has been enabled on the router through the use of the match protocol commands within the class-map.
B) The unknown protocol traffic statistics refer to all the traffic matched by the class-default traffic class.
C) The 5-minute average bits-per-second rate for all traffic entering the Fa0/0 interface is 398 kbps.
D) There is a total of 39,990 NetBIOS packets exiting the Fa0/0 interface.
E) HTTP is the most active protocol on the Fa0/0 interface based on byte count.

3. Where is the error in the following policy-map configuration?
policy-map test class voice priority 168 class mission-critical bandwidth 192 random-detect class class-default fair-queue bandwidth 128

A) The voice traffic class is missing the random-detect command.
B) The mission-critical traffic class is missing the queue-limit command.
C) Fair-queue should be enabled for the mission-critical traffic class.
D) The mission-critical traffic class bandwidth guarantee should be lower than the voice traffic class priority bandwidth guarantee.
E) The bandwidth command is not a valid command for the class-default traffic class in this case.

4. At the network layer, IP packets are typically classified based on which three items? (Choose three.)

A) flow control bits
B) VLAN Identifier
C) content of the ToS byte
D) source and destination IP addresses
E) packet length

5. What is the purpose of using multiactions traffic policing?

A) so that conform traffic from different flows can be marked with different DSCPs
B) so that traffic can be policed using two separate rates
C) so that class-based policing can mark at Layer 2 and Layer 3 at the same time
D) so that conform, exceed, and violate traffic can be marked with different CLPs
E) so that exceed traffic can be shaped and violate traffic can be policed

Solutions: